gcc/testsuite/gcc.dg/uninit-15.c

   1 /* PR tree-optimization/17506
   2    We used to issue an uninitialized variable warning at a wrong location at
   3    line 11, which is very confusing.  Make sure we print out a note to
   4    make it less confusing.  (xfailed alternative)
   5    But it is of course ok if we warn in bar about uninitialized use
   6    of j.  (not xfailed alternative)  */
   7 /* { dg-do compile } */
   8 /* { dg-options "-O1 -Wuninitialized" } */
   9
  10 inline int
  11 foo (int i)
  12 {
  13   if (i) /* { dg-warning "used uninitialized" "" { xfail *-*-* } } */
  14     return 1;
  15   return 0;
  16 }
  17
  18 void baz (void);
  19
  20 void
  21 bar (void)
  22 {
  23   int j;                /* { dg-message "note: 'j' was declared here" } */
  24   for (; foo (j); ++j)  /* { dg-warning "'j' is used uninitialized" } */
  25     baz ();
  26 }